Slow Internet ==> Slow DNS?
I've a problem that I can't seem to find a solution too.
Windows 2k8R2 running DNS (AD/PrintServer) on VMWare ESXi 5.1 (dedicated NIC in host)
DNS forwarders set up to point to ISP. Firewall on server and VMware has ports 53 open for TCP and UDP.
Firewall also has ports 53 open for outbound traffic.
Internal name resolution looks fine, responese when using NSLookup run fine. However when accessing external sites in IE (and firefox) it hangs then comes up with "page not displayed".
NSlookups then time out.
However it's not consistant, the name resolution is slow but sometimes works. Then seems to wake up and run super fast before I start getting pages not displayed. If I download a file I get the full bandwidth so I know it's not our internet overall. It lacks any form of consistnecy that would be usefull in determining the cause!
but I'm running out of ideas.
The setup prety much mirrors our other site which runs fine. The only differnece being the DNS servers are physical.
To make matters more frustrating there is a seperate wireless network which runs seperately on a different VLAN and has it's own firewall and this is fine. Runs as quickly as I would expect.
And advice would be appreciated..